Could you please take ______notebooks to the teachers' office？（ ）
A．youB．yourC．yours
I often play ______chess after class．（ ）
A．aB．theC．/
Neither Li Hua nor I ___good at writing．（ ）
A．amB．isC．are
It is important ___us to make full use of time．（ ）
A．forB．ofC．with
The woman ___is talking with my mother is our class teacher．（ ）
A．whichB．whoC．whose